Vulnerability-Lookup

CNVD-2021-59140

Vulnerability from cnvd - Published: 2021-08-06

Title

Emissary-Ingress信任管理问题漏洞

Description

Emissary-Ingress是开源的一个用于Envoy代理构建的微服务的Kubernetes原生API网关。 Emissary-Ingress存在信任管理问题漏洞，攻击者可利用该漏洞绕绕过后端上游的客户端证书要求。

Severity

中

Patch Name

Emissary-Ingress信任管理问题漏洞的补丁

Patch Description

Emissary-Ingress是开源的一个用于Envoy代理构建的微服务的Kubernetes原生API网关。 Emissary-Ingress存在信任管理问题漏洞，攻击者可利用该漏洞绕绕过后端上游的客户端证书要求。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://git.tartarus.org/?p=simon/putty.git;a=commit;h=1dc5659aa62848f0aeb5de7bd3839fecc7debefa

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-36371

Impacted products

Name
Emissary-Ingress Emissary-Ingress <1.13.9

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-36371"
    }
  },
  "description": "Emissary-Ingress\u662f\u5f00\u6e90\u7684\u4e00\u4e2a\u7528\u4e8eEnvoy\u4ee3\u7406\u6784\u5efa\u7684\u5fae\u670d\u52a1\u7684Kubernetes\u539f\u751fAPI\u7f51\u5173\u3002\n\nEmissary-Ingress\u5b58\u5728\u4fe1\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u7ed5\u8fc7\u540e\u7aef\u4e0a\u6e38\u7684\u5ba2\u6237\u7aef\u8bc1\u4e66\u8981\u6c42\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://git.tartarus.org/?p=simon/putty.git;a=commit;h=1dc5659aa62848f0aeb5de7bd3839fecc7debefa",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-59140",
  "openTime": "2021-08-06",
  "patchDescription": "Emissary-Ingress\u662f\u5f00\u6e90\u7684\u4e00\u4e2a\u7528\u4e8eEnvoy\u4ee3\u7406\u6784\u5efa\u7684\u5fae\u670d\u52a1\u7684Kubernetes\u539f\u751fAPI\u7f51\u5173\u3002\r\n\r\nEmissary-Ingress\u5b58\u5728\u4fe1\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u7ed5\u8fc7\u540e\u7aef\u4e0a\u6e38\u7684\u5ba2\u6237\u7aef\u8bc1\u4e66\u8981\u6c42\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Emissary-Ingress\u4fe1\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Emissary-Ingress Emissary-Ingress \u003c1.13.9"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-36371",
  "serverity": "\u4e2d",
  "submitTime": "2021-07-13",
  "title": "Emissary-Ingress\u4fe1\u4efb\u7ba1\u7406\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2021-36371 (GCVE-0-2021-36371)

Vulnerability from cvelistv5 – Published: 2021-07-09 20:19 – Updated: 2024-08-04 00:54

Summary

Emissary-Ingress (formerly Ambassador API Gateway) through 1.13.9 allows attackers to bypass client certificate requirements (i.e., mTLS cert_required) on backend upstreams when more than one TLSContext is defined and at least one configuration exists that does not require client certificate authentication. The attacker must send an SNI specifying an unprotected backend and an HTTP Host header specifying a protected backend. (2.x versions are unaffected. 1.x versions are unaffected with certain configuration settings involving prune_unreachable_routes and a wildcard Host resource.)

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

2 references

URL	Tags
https://github.com/emissary-ingress/emissary/issu…	x_refsource_MISC
https://github.com/emissary-ingress/emissary/rele…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T00:54:51.414Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/emissary-ingress/emissary/issues/3340"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/emissary-ingress/emissary/releases/tag/v2.0.0-ea"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Emissary-Ingress (formerly Ambassador API Gateway) through 1.13.9 allows attackers to bypass client certificate requirements (i.e., mTLS cert_required) on backend upstreams when more than one TLSContext is defined and at least one configuration exists that does not require client certificate authentication. The attacker must send an SNI specifying an unprotected backend and an HTTP Host header specifying a protected backend. (2.x versions are unaffected. 1.x versions are unaffected with certain configuration settings involving prune_unreachable_routes and a wildcard Host resource.)"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-07-12T19:21:53.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/emissary-ingress/emissary/issues/3340"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/emissary-ingress/emissary/releases/tag/v2.0.0-ea"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-36371",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Emissary-Ingress (formerly Ambassador API Gateway) through 1.13.9 allows attackers to bypass client certificate requirements (i.e., mTLS cert_required) on backend upstreams when more than one TLSContext is defined and at least one configuration exists that does not require client certificate authentication. The attacker must send an SNI specifying an unprotected backend and an HTTP Host header specifying a protected backend. (2.x versions are unaffected. 1.x versions are unaffected with certain configuration settings involving prune_unreachable_routes and a wildcard Host resource.)"
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/emissary-ingress/emissary/issues/3340",
              "refsource": "MISC",
              "url": "https://github.com/emissary-ingress/emissary/issues/3340"
            },
            {
              "name": "https://github.com/emissary-ingress/emissary/releases/tag/v2.0.0-ea",
              "refsource": "MISC",
              "url": "https://github.com/emissary-ingress/emissary/releases/tag/v2.0.0-ea"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-36371",
    "datePublished": "2021-07-09T20:19:45.000Z",
    "dateReserved": "2021-07-09T00:00:00.000Z",
    "dateUpdated": "2024-08-04T00:54:51.414Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CNVD-2021-59140

CVE-2021-36371 (GCVE-0-2021-36371)

Tags

Sightings

Nomenclature

Related by attack behaviour